Estimate Project

Ok, so you have an important project and choosing the right digital partner is vital for your success. We get that. Tell us a bit about who you are and what you want, and we will contact you within one business day.

Could you give us a head start?

  • What does your business do?
  • What do you want to achieve with this project?
  • What is the business case?
  • What is your budget and timeframe?

Thank you for getting in touch. We will get back to you within one business day.

Go back to offers

Senior Developer

We’re u2i - a tech company comprising of 50 problem-solvers with diverse skill sets in back end, front end, full stack, mobile, UX design and DevOps. And we’re on the lookout for a Senior Developer to join our team in creating great products hand in hand with our US-based Clients.

But most importantly, we hope to find a true colleague and friend who’ll enjoy facing everyday challenges, striving for technical excellence and growing together, as well as a solid partner in helping the Clients think about technology and navigate the paths of building products.

Sounds interesting? If so, keep reading.

Because what you might not have known is that we’re an employee empowered company. This means that you will have an actual impact on the company’s actions and a share in its profits. Also, we have incorporated many elements of a flat structure, so you won’t have to work around any communication barriers or have anyone standing above you and telling you what to do. And finally, we believe that autonomy is the springboard for awesome ideas, so we’ll give you the tools and independence to experiment and own your initiatives.

As a Senior Developer at u2i you’ll start in a 6-people team working on a Big Data product around social media platforms and measurement, which:

  • works directly with the PO (in the US)
  • takes on projects extending the system with new reporting options, metrics and data sources
  • operates mostly in Ruby or RoR backend services that collect and process data and adds the new data to a React app
  • uses Jenkins for CI
  • heavily leverages AWS services (i.a. EC2, ECS, S3, RDS, EMR, Lambda, Cloudwatch, Athena, SQS, SNS)

We might be a great match for each other if you have:

  • 6+ years of experience in software development
  • great command of English (C1/C2)
  • thorough knowledge of at least one programming language (and you’re happy to work in/learn Ruby)
  • know your way around the concepts, tools and designs of web applications
  • fluency in writing performant SQL queries and designing databases
  • the ability to design applications and reason about code design
  • an understanding of agile and Lean methodologies for a seamless and adaptive workflow
  • the consultative gene - you ask the right questions, know how to build trust and credibility, and enjoy sharing your knowledge
  • experience in working in a team and great collaboration skills
  • an open and curious mind - you’re eager to experiment and see opportunities where others don’t

It would also be great if you:

  • have a general know-how of AWS
  • are familiar with Ruby on Rails, React, Scala, TypeScript, Hadoop / EMR / Hive, Docker
  • have had the opportunity to work directly with a client (especially US-based)
  • have experience with APIs of major social media platforms
  • know the domains of Big Data and TV measurement

What about perks and benefits? Let us break them down for you:


  • up to 10% of your week dedicated to self-development
  • an opportunity to take part in training courses and Gallup Strengths coaching
  • conference and education budget - you name the event!
  • English classes with native speakers at the office

Physical wellbeing:

  • yummy breakfasts, snacks and fully-covered lunches (which you can have delivered to the office or you can enjoy a walk to one of the hip restaurants nearby)
  • Multisport card and medical insurance when hired on regular job contract

Work arrangement:

  • laptop of your choice
  • flexible working hours / working from home if there's a need / a month long workation is fine too :)
  • the occasional business trips to the US (mainly NYC, Chicago)
  • 20-26 days per year of paid holiday and additional sick leave or special leave days (including parental leave) with B2B

Learn more about us by reading a short piece by Corporate Rebels or grab Weronika for a chat on LinkedIn.

If you feel the chemistry already just hit „apply” and let’s give it a go!


PLN 18,000 - 25,000 (B2B) / PLN 15,000 - 21,000 gross (UoP)


Kraków, ul. Przemysłowa 12A

Other people onboard

Step 1

First and foremost, we would like to get to know you. Send us your CV along with a short note:

we use cookies to enhance your experience I accept read more...